You can easily backup WhatsApp messages and attachments from your iOS device to computer with Dr.Fone for iOS. Once the data is lost, you can restore them at any time. What's more, the WhatsApp messages, photos and others can be transferred freely between iPhone and Android phones.
Works with all iOS Devices like:
iPhone 7 / 7 Plus;
iPhone 6S / 6S Plus, iPhone 6 / 6 Plus;
iPhone SE, iPhone 5S / 5C and more